JAVA Spring MVC路由写法

蔚落 2022-06-05 11:49 251阅读 0赞

常用的一些Spring MVC的路由写法以及参数传递方式。

这是一些测试代码：

![复制代码][copycode.gif]

package com.my.controller;
    
    import java.io.PrintWriter;
    import java.util.Date;
    
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    
    import org.springframework.format.annotation.DateTimeFormat;
    import org.springframework.stereotype.Controller;
    import org.springframework.ui.Model;
    import org.springframework.web.bind.annotation.PathVariable;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RequestMethod;
    import org.springframework.web.bind.annotation.RequestParam;
    import org.springframework.web.bind.annotation.ResponseBody;
    import org.springframework.web.servlet.ModelAndView;
    
    @Controller
    @RequestMapping(value="/default")
    public class TestController {
    
        /**
         * 使用ModelAndView
         * @return
         */
        @RequestMapping("/")
        public ModelAndView index() {
            ModelAndView mv = new ModelAndView();
            mv.addObject("message", "This is index!");
            mv.setViewName("index");
            return mv;
        }
        
        /**
         * 使用Model
         * @param model
         * @return
         */
        @RequestMapping("/index2")
        public String index2(Model model) {
            model.addAttribute("message", "This is index2!");
            return "index2";
        }
        
        /**
         * 直接返回内容
         * @return
         */
        @RequestMapping(value="/index3", method=RequestMethod.GET)
        @ResponseBody
        public String index3() {
            return "This is index3!";
        }
        
        /**
         * 直接返回对应的index4的view
         */
        @RequestMapping(value="/index4", method=RequestMethod.GET)
        public void index4() {
        }
        
        /**
         * 直接返回index5的view，注意方法后缀：Handler
         * 比较与index4的区别
         */
        @RequestMapping(value="/index5", method=RequestMethod.GET)
        public void index5Handler() {
        }
        
        /**
         * 传参方式调用
         * @param message
         * @return
         */
        @RequestMapping(value="/index6/{message}", method=RequestMethod.GET)
        public ModelAndView index6(@PathVariable String message) {
            ModelAndView view = new ModelAndView("index6");
            view.addObject("message", message);
            return view;
        }
        
        /**
         * 传参方式调用，使用Model
         * 注意方法内的Model是直接addAttribute，没有key
         * 区别index6
         * @param message
         * @param model
         * @return
         */
        @RequestMapping(value="/index7/{message}", method=RequestMethod.GET)
        public String index7(@PathVariable String message, Model model) {
            model.addAttribute(message);
            return "index6";
        }
        
        /**
         * 传参调用
         * 指定参数名称
         * @param userName
         * @param password
         * @return
         */
        @RequestMapping(value="/index8/{username}/{password}")
        public ModelAndView index8(@PathVariable("username") String userName, @PathVariable("password") String password) {
            ModelAndView view = new ModelAndView("index8");
            view.addObject("userName", userName);
            view.addObject("password", password);
            return view;
        }
        
        /**
         * 使用request/response取得参数
         * @param request
         * @param response
         * @return
         */
        @RequestMapping(value="/index9")
        public String index9(HttpServletRequest request, HttpServletResponse response) {
            String message = request.getParameter("message");
            request.setAttribute("message", message);
            return "index9";
        }
        
        /**
         * 使用@RequestParam方式取得参数
         * @param message
         * @return
         */
        @RequestMapping(value="/index10")
        public ModelAndView index10(@RequestParam("message") String message) {
            ModelAndView view = new ModelAndView("index10");
            view.addObject("message", message);
            return view;
        }
        
        /**
         * 默认传参方式
         * @param message
         * @param model
         * @return
         */
        @RequestMapping(value="/index11")
        public String index11(String message, Model model) {
            model.addAttribute("message", message);
            return "index10";
        }
        
        /**
         * 传入PrintWriteer，也可以传入@CookieValue
         * @param out
         * @param message
         * @param model
         * @return
         */
        @RequestMapping(value="/index12")
        public String index12(PrintWriter out, String message, Model model) {
            out.println(message);
            model.addAttribute("message", message);
            return "index10";
        }
        
        /**
         * 日期参数
         * @param day
         * @return
         */
        @RequestMapping(value="/index13")
        public ModelAndView index13(@RequestParam("day") @DateTimeFormat(pattern="yyyy-MM-dd") Date day) {
            ModelAndView view = new ModelAndView("index10");
            view.addObject("message", day.toString());
            return view;
        }
        
        /**
         * 默认action
         * @param message
         * @return
         */
        @RequestMapping
        public ModelAndView index14(String message) {
            ModelAndView view = new ModelAndView("index");
            view.addObject("message", message);
            return view;
        }
        
        /**
         * 限制访问的地址，必需有参数p=1才能触发
         * @param message
         * @param model
         * @return
         */
        @RequestMapping(value="/index15/{message}", params="p=1", method=RequestMethod.GET)
        public String index15(@PathVariable("message") String message, Model model) {
            model.addAttribute("message", message);
            return "index";
        }
        
    }

![复制代码][copycode.gif]

[copycode.gif]: /images/20220605/5bdebb15233f4f378e1083614fc0da9b.png